Plasmodium berghei : the use of discontinuous urografin density gradients for the separation of exoerythrocytic malaria parasitesG. François, I. Desombere and M. WéryAnn. Parasitol. Hum. Comp., 68 5-6 (1993) 220-225DOI: https://doi.org/10.1051/parasite/1993685220